Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 72 for “"quantum chromodynamics (QCD)"”.
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High energy two-body deuteron photodisintegration
… with a variety of theoretical models inspired by quantum chromodynamics (QCD) and traditional hadronic nuclear physics.
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J / ( ) production in heavy ion collisions at the STAR detector at RHIC
… and the Z, W±, and Higgs bosons. The theory of Quantum Chromodynamics (QCD), which describes the strong interaction between quarks and gluons in the Standard Model, predicts a phase transition from hadronic matter to a deconfined Quark Gluon Plasma (QGP) at high temperature and energy density. …
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Thermodynamics of 5-flavor QCD
… investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done via …
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UNDERLYING EVENTS AND SOFT QCD
Recent highlights in various soft Quantum Chromodynamics (QCD) phenomena are discussed, focusing on the measurement of the underlying event at 2.76 and 13 TeV with the CMS Collaboration at the Large Hadron Collider (LHC). Such soft QCD phenomena are of huge phenomenological and experimental …
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Nonperturbative quark mass and coupling renormalization in two flavor QCD.
… renormalization is studied for two flavor quantum chromodynamics (QCD). In particular, the β function for the case of Kogut-Susskind quarks is determined over the parameter space of existing lattice (spectrum) simulations from the existing spectrum data. This β function is combined with a …
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High Energy Two -Body Deuteron Photodisintegration
… with a variety of theoretical models inspired by quantum chromodynamics (QCD) and traditional hadronic nuclear physics.
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The structure of hadrons and other potential phases of QCD
Quantum chromodynamics (QCD) is a mathematical theory describing subatomic particles called quarks and gluons, and the strong force that binds them together into protons and neutrons. This thesis centers on two major thrusts of modern QCD research: (1) uncovering the inner quark and gluon structure …
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Probing the Nonperturbative Physics of QCD with Normalizing Flows and a moderate number of Pions
Quantum Chromodynamics (QCD) is a cornerstone of the standard model of particle physics, and the best known theory of strong nuclear interactions. The only known systematically improvable ab-initio method for accessing the nonperturbative physics of QCD is Lattice QCD is, and this thesis presents …
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Jet quenching in heavy-ion collisions at LHC with CMS detector
… which can be used to learn about the behavior of quantum chromodynamics (QCD) at extreme conditions, such as those of the universe at times before and during the formation of hadrons out of quarks and gluons. This thesis presents experimental studies of jet-quenching phenomena in PbPb collisions …
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Feasibility study on extracting the gluon polarization in Di-Jet production in polarized pp collisions at RHIC
… These studies provide fundamental tests of Quantum Chromodynamics (QCD). One of the main objectives of the STAR spin physics program is the determination of the polarized gluon distribution function through a measurement of the longitudinal double-spin asymmetry, ALL, for various processes. …
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Light vector meson production at forward rapidity in pp collisions at the LHC with the ALICE detector
… is also useful by itself, to study soft Quantum ChromoDynamics (QCD) in the LHC energy range, since calculations in this regime are based on QCD inspired phenomenological models that must be tuned to the data. The ALICE experiment at the LHC can access vector mesons produced at forward …
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The Runny Gauge Plasma: shear viscosity to entropy for quarks and gluons
… properties of the QGP, within the theory of quantum chromodynamics (QCD). Meaningful approximations of most observables require quantum fluctuations to be taken into account. These arise in perturbation theory as loop corrections to tree level amplitudes, and describe both the …
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Accelerating Flow-Based Sampling for Large-𝑁 Gauge Theories
… computational challenges due to its complexity. Quantum chromodynamics (QCD), which can be described as an SU(3) gauge theory due to the 3 quark colors and 8 gluon types, is one sector of the Standard Model for which computing solutions is especially challenging. A natural theoretical …
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Deeply Virtual Compton Scattering at Hall A, Jefferson Lab
… are mediated by force carrying gauge bosons. Quantum ChromoDynamics (QCD), the theory that explains the strong interaction is still not complete enough to derive the physical observables of a Quark-Gluon system from the fundamental degrees of freedom of it’s constituents. Experimentally …
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Functional Renormalization Group Methods in Quantum Chromodynamics
… functional Renormalization Group methods to Quantum Chromodynamics (QCD). First we calculate the mass shift for the pion in a finite volume in the framework of the quark-meson model. In particular, we investigate the importance of quark effects. As in lattice gauge theory, we find that the …
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Isospin Violating Hadronic Mass Splittings using Lattice QCD+QED
… century was the development of the theories of quantum chromodynamics (QCD) and quantum electrodynamics (QED), which reveal an even deeper layer of structure than the atom and the nucleon. We use the non-perturbative method of lattice QCD+QED to make precision estimates of the masses and mass …
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The study of the production of heavy flavour muons as a function of charged-particle multiplicity in proton-proton collisions at 8TeV with ALICE at the LHC
… in which a hot, dense and strongly interacting Quantum Chromodynamics (QCD) medium called the Quark Gluon Plasma (QGP) is created. ALICE also studies proton-proton collisions both to test for pertubative QCD (pQCD) theories and as reference for comparison with heavy-ion collisions. ALICE …
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Energy and centrality dependence of mid-rapidity charged particle multiplicity in relativistic heavy-ion collisions
The properties of quantum chromodynamics (QCD), the modern theory of the strong interaction, can be investigated through the study of relativistic nucleus-nucleus collisions. Recently, the Relativistic Heavy-Ion Collider (RHIC) was completed and started taking data at ten times higher …
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'Variational' optimization in quantum field theory
We examine two different techniques for studying quantum field theories in which a 'variational' optimization of parameters plays a crucial role. In the context of the O(N)-symmetric $\lambda\phi\sp4$ theory we discuss variational calculations of the effective potential that go beyond the Gaussian …
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Charged hadron transverse momentum spectra in Au+Au and d+Au collisions at 200 GeV per nucleon pair
… hadronic matter under extreme conditions and quantum chromodynamics (QCD) can be collected. One of the predictions of QCD is that at very high energy densities the quarks and gluons within hadrons will become deconfined and form a Quark-Gluon Plasma (QGP). These densities are thought to be …
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